/* ==========================================================
   emotional - 時の瞬き
   Opening UI
   ========================================================== */

:root{

    --bg:#000000;

    --white:#ffffff;
    --silver:#d8d8d8;
    --gold:#d8b46a;

    --glass:rgba(255,255,255,.045);
    --glassHover:rgba(255,255,255,.08);

    --border:rgba(255,255,255,.16);

    --shadow:
        0 0 0 1px rgba(255,255,255,.04),
        0 10px 40px rgba(0,0,0,.55);

    --radius:22px;

    --transition:.45s cubic-bezier(.22,.61,.36,1);

}


/* ==========================================================
   Reset
   ========================================================== */

*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}

html{
    width:100%;
    min-height:100%;
    background:#000;
    overflow-x:hidden;
    overflow-y:auto;
    -webkit-text-size-adjust:100%;
}

body{
    width:100%;
    min-height:100vh;
    background:var(--bg);
    color:white;
    font-family:"Noto Serif JP",serif;
    overflow-x:hidden;
    overflow-y:auto;
    display:flex;
    justify-content:center;
    align-items:flex-start;
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
}


/* ==========================================================
   Opening Layout
   ========================================================== */

#opening{
    width:min(92vw,520px);
    min-height:100vh;
    display:flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    gap:40px;
    padding:
        max(90px,env(safe-area-inset-top))
        24px
        max(26px,env(safe-area-inset-bottom));
    margin:0 auto;
}


/* ==========================================================
   Title
   ========================================================== */

.titleArea{
    position:relative;
    width:100%;
    display:flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    flex-shrink:0;
    padding-block:12px;
    opacity:0;
}

body.loaded .titleArea{
    animation:titleFadeIn 1.5s ease forwards;
}

@keyframes titleFadeIn{
    from{ opacity:0; }
    to{ opacity:1; }
}

#flareCanvas{
    position:absolute;
    top:45%;
    left:50%;
    width:min(170vw,1100px);
    aspect-ratio:1/1;
    transform:translate(-50%,-50%);
    z-index:-1;
    pointer-events:none;
    display:block;
}

#flareCanvas.flash{
    animation:flareFlash 0.7s ease;
}

@keyframes flareFlash{
    0%{ filter:brightness(1); }
    30%{ filter:brightness(2.1) saturate(1.25); }
    100%{ filter:brightness(1); }
}

#logoCanvas{
    width:min(96vw,760px);
    max-width:760px;
    aspect-ratio:700 / 170;
    height:auto;
    display:block;
    pointer-events:none;
    position:relative;
    z-index:1;
}

.titleJapanese{
    margin-top:10px;
    font-size:clamp(.95rem,3.5vw,1.28rem);
    font-weight:300;
    letter-spacing:.42em;
    color:rgba(220,220,220,.88);
    text-align:center;
    line-height:1.8;
}
/* ==========================================================
   Opening Message
   ========================================================== */

.openingMessage{

    position:absolute;

    left:50%;

    top:55%;

    transform:translate(-50%,10px);

    width:min(88vw,420px);

    padding:0 16px;

    text-align:center;

    line-height:1.95;

    font-size:clamp(0.82rem,2.8vw,0.92rem);

    letter-spacing:.06em;

    color:rgba(230,230,230,.84);

    opacity:0;

    transition:
        opacity 1.5s ease,
        transform 1.5s ease;

    pointer-events:none;

    z-index:2;
}

.openingMessage p{
    white-space:nowrap;
}

.openingMessage.show{

    opacity:1;

    transform:translate(-50%,0);

}

.openingMessage.hide{

    opacity:0;

    transform:translate(-50%,-8px);

}
/* ==========================================================
   Clock Button（円形・ネビュラ・リング・周回光）
   ========================================================== */

#clockButtonWrap{
    position:relative;
    width:min(260px,66vw);
    aspect-ratio:1/1;
    flex-shrink:0;
    opacity:0;
}

#clockButtonWrap.reveal{
    animation:fadeInPlace 1.8s ease forwards;
}

@keyframes fadeInPlace{
    from{ opacity:0; }
    to{ opacity:1; }
}

#nebulaCanvas{
    position:absolute;
    top:50%;
    left:50%;
    width:135%;
    height:135%;
    transform:translate(-50%,-50%);
    pointer-events:none;
}

#ringCanvas{
    position:absolute;
    top:50%;
    left:50%;
    width:100%;
    height:100%;
    transform:translate(-50%,-50%);
    pointer-events:none;
}

#startButton{
    position:absolute;
    inset:0;
    margin:auto;
    width:68%;
    aspect-ratio:1/1;
    border-radius:50%;

    border:none;
    background:transparent;

    color:#f2ecdf;
    font-family:"Cormorant Garamond", serif;

    display:flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;

    cursor:pointer;

    transition:transform .15s ease;
}

#startButton span{
    font-size:1.15rem;
    letter-spacing:.16em;
    text-shadow:0 0 12px rgba(255,240,220,.35);
}

#startButton small{
    font-size:.82rem;
    letter-spacing:.14em;
    margin-top:.35em;
    opacity:.85;
}

#startButton:active{
    transform:scale(.96);
}


/* ==========================================================
   Bottom Bar
   ========================================================== */

.bottomBar{
    width:100%;
    display:flex;
    justify-content:space-between;
    align-items:center;
    gap:10px;
    margin-top:22px;
    opacity:0;
    transform:translateY(16px);
}

.bottomBar.reveal{
    animation:fadeUp .9s ease forwards;
}

.bottomBar button{
    flex:1;
    height:24px;
    border-radius:10px;
    border:1px solid rgba(255,215,145,.28);
    background:rgba(255,255,255,.015);
    color:rgba(255,255,255,.32);
    font-size:.58rem;
    letter-spacing:.05em;
    cursor:pointer;
    transition:all var(--transition);
    backdrop-filter:blur(10px);
    -webkit-backdrop-filter:blur(10px);
    box-shadow:
        inset 0 1px 2px rgba(0,0,0,.3),
        0 0 6px rgba(255,215,145,.12);
    position:relative;
    overflow:hidden;
}

.bottomBar button:hover{
    background:rgba(255,255,255,.04);
    color:rgba(255,255,255,.55);
}

.bottomBar button:active{
    transform:scale(.98);
}


/* ==========================================================
   Credit
   ========================================================== */

.credit{
    width:100%;
    text-align:center;
    margin-top:-28px; /* gapの40pxを打ち消して、実質12px程度の間隔にする */
    font-family:"Cormorant Garamond", serif;
    font-size:.9rem;
    letter-spacing:.14em;
    color:rgba(230,175,190,.42);
    opacity:0;
}

.credit.reveal{
    animation:fadeUp .9s ease forwards;
}


/* ==========================================================
   Information Panel
   ========================================================== */

#infoPanel{
    position:fixed;
    inset:0;

    background:rgba(0,0,0,.72);
    backdrop-filter:blur(18px);
    -webkit-backdrop-filter:blur(18px);

    display:flex;
    justify-content:center;
    align-items:flex-start;

    overflow-y:auto;

    padding:40px 18px;

    opacity:0;
    visibility:hidden;

    transition:
        opacity .45s ease,
        visibility .45s ease;

    z-index:100;
}

#infoPanel.show{
    opacity:1;
    visibility:visible;
}

.infoContent{

    width:min(90vw,500px);

    margin:auto 0;

    max-height:calc(100vh - 80px);

    overflow-y:auto;

    background:rgba(18,18,18,.84);

    border:1px solid rgba(255,255,255,.12);

    border-radius:28px;

    padding:34px 28px;

    display:flex;
    flex-direction:column;

    gap:18px;

    box-shadow:
        0 24px 80px rgba(0,0,0,.65);

    -webkit-overflow-scrolling:touch;
}

.infoContent h3{

    font-family:"Cormorant Garamond",serif;

    font-size:2rem;

    font-weight:400;

    letter-spacing:.08em;

    text-align:center;

    color:rgba(255,248,240,.95);
}

.infoContent p{

    font-size:.9rem;

    line-height:1.9;

    color:rgba(235,235,235,.82);
}

.infoContent strong{

    display:block;

    margin-bottom:8px;

    font-family:"Cormorant Garamond",serif;

    font-size:1.1rem;

    font-weight:500;

    color:rgba(255,240,220,.92);
}

.infoDivider{

    width:100%;

    height:1px;

    background:linear-gradient(
        90deg,
        transparent,
        rgba(255,255,255,.15),
        transparent
    );
}

.infoNote{

    text-align:center;

    font-size:.8rem;

    color:rgba(255,255,255,.52);

    letter-spacing:.04em;
}

#closeInfo{

    align-self:center;

    width:170px;

    height:44px;

    margin-top:8px;

    border:none;

    border-radius:999px;

    background:rgba(255,255,255,.04);

    border:1px solid rgba(255,255,255,.14);

    color:rgba(255,255,255,.9);

    font-family:"Cormorant Garamond",serif;

    font-size:1rem;

    cursor:pointer;

    transition:all .35s ease;
}

#closeInfo:hover{

    background:rgba(255,255,255,.08);

    border-color:rgba(255,220,170,.28);
}
/* ==========================================================
   Responsive
   ========================================================== */

@media (max-width:420px){

    #opening{
        padding:
        max(24px,env(safe-area-inset-top))
        20px
        max(20px,env(safe-area-inset-bottom));
    }

    #clockButtonWrap{
        width:min(225px,64vw);
    }

    .bottomBar{
        gap:10px;
    }

    .bottomBar button{
        height:22px;
        font-size:.55rem;
    }

}


/* ==========================================================
   Landscape
   ========================================================== */

@media (orientation:landscape){
    #opening{
        transform:scale(.88);
    }
}


/* ==========================================================
   Animations
   ========================================================== */

@keyframes fadeUp{
    from{
        opacity:0;
        transform:translateY(16px);
    }
    to{
        opacity:1;
        transform:translateY(0);
    }
}